British American Tobacco – British American Tobacco will lay off 2,300 workers by January, about 4% of its workforce. The move by the world's second largest tobacco company will affect more than 20% of its upper management roles.

Blackstone – Blackstone raised $20.5 billion for its largest-ever real estate fund. The private-equity firm plans to invest in property around the world.

AT&T – AT&T said weakness in its wireless equipment unit could hurt current-quarter revenue, and also said this quarter's revenue at its WarnerMedia unit would fall by $400 million from a year ago.

Yelp – Yelp may be an acquisition target of daily deals company Groupon, according to The Wall Street Journal. The paper said Groupon is planning an acquisition amid shareholder discontent about its performance, and that the online review site may be a logical matchup.

General Electric – GE received $2.7 billion from its previously announced plan to reduce its ownership in Baker Hughes. GE sold shares at $21.50 per share and reduced its stake in Baker Hughes to 38.4 percent from more than 50%.

Activision Blizzard – The video game maker's stock was upgraded to "buy" from "neutral" at Nomura Instinet, which notes momentum from the August launch of "World of Warcraft Classic" and positive reception surrounding the October launch of "Modern Warfare."

AbbVie – UBS upgraded the drug maker to "buy" from "neutral," based on optimism surrounding its acquisition of Allergan and the ability of key growth assets to offset the impact of declining Humira sales.